Vincent Jackson spent 12 years in the NFL as a wide receiver. After his death in February, the autopsy revealed he had Stage 2 CTE, a degenerative brain disease common among former football players. WATCH NIGHTLINE EPISODES: https://abc.go.com/shows/nightline ALSO AVAILABLE ON HULU: https://hulu.tv/2wSmSrZ #Nightline # VincentJackson #CTE #Exclusive #NFL